Synthesis and Characterization of Elongated Chain-like Nanostructure Polyaniline in Ice Cube

Abstract

Highly crystalline polyaniline (PANI) with elongated chain-like nanostructures 20–35 nm in diameter and 60–80 nm in length were prepared using sodium dodecylbenzenesulfonic acid (SDBSA) in ice medium without stirring. The synthesized polyanilines were characterized by SEM, FTIR, and UV-Visible spectroscopy and XRD measurements. The formation of polyaniline/SDBSA salts insoluble in reaction system without stirring is found to be favourable for the formation of this clustered chain-like nanostructure. The temperature dependent conductivity measurement shows a thermally activated exponential behaviour of the chain-like polyaniline nanostructure. The melting point of the nanostructured polyaniline was found to be 253 °C.

Enhancement of microwave absorption of polyaniline–PbTiO3 composites prepared by using sodium dodecyl benzene sulfonoic acid

“…Another absorption peak is also observed at 2005 cm À1 , which can be attributed due to carbonate ion impurities. 17 Figure 1(c) shows the FTIR spectra of PANI-PbTiO 3 composites for 50 wt% of PbTiO 3 in PANI where the important peaks are observed; peak at 587 cm À1 corresponds to Ti-O vibration, peak at 802 cm À1 is due to C-H vibration of para coupled benzene ring, peak at 1142 cm À1 is due to C-O stretching, peak at 1302 cm À1 is due to C-O-C stretching (C-N stretching), peak at 1478 cm À1 is due to CH 2 bending, peak at 1560 cm À1 is due to C 5 C quinoid ring, and peak at 2923 cm À1 is due to C-H stretching, indicating the presence of PbTiO 3 in PANI. On comparing the major intense peaks observed in FTIR spectra of pure PANI, pure PbTiO 3 , and PANI-PbTiO 3 composites, it is noticed that intensity peaks observed in PANI-PbTiO 3 composites do not show much resemblance to that of the either PANI or PbTiO 3 .…”

“…At room temperature, there are possible minimum energy positions for Ti 41 ions, which are off-cantered and therefore give rise to permanent electric dipoles. 17 Similarly, the conducting PANI in its emeraldine base form when protonated by HCl acid solution possesses permanent electric dipoles. Therefore, in both the cases, orientation (dipolar) polarization is the dominant polarization and the associated relaxation phenomenon constitutes a loss mechanism.…”

Synthesis, Characterisation, and Conductive Superparamagnetism Studies of γ-Fe2O3/Polyaniline-Levodopa Composites

“…Polyaniline (PANI), an important conducting polymer, has become a very sought after material because of its excellent electrochemical activity and special doping mechanism [1][2][3][4]. In most of these applications, the main objective is to obtain a sufficient level of conductivity in the PANI composites [5][6][7][8].…”